OpenConstructionERP vs STACK
OpenConstructionERP
openconstructionerp.comSTACK
stackct.comSide by side
| Figure | OpenConstructionERP | STACK |
|---|---|---|
| Price from | €100/mo | $49/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 11 | 8 |
| Spec score · Construction Estimating Software | 9.1 (#5) | 8.8 (#8) |
| Estimating | Its BOQ tools include hierarchical sections, positions, resources, assemblies and automatic markups. | Quantities flow into live estimates with item and assembly libraries, proposals and AI checks for pricing risk. |
| Integrations | Listed connections include Excel, SAP, DATEV, Xero, Revit, AutoCAD, MicroStation, SharePoint, Google Drive, Dropbox, Nextcloud, Power BI, Tableau, Metabase, MS Project, n8n, Zapier and Make. | The partner ecosystem includes CRM, ERP, accounting and construction technology connections, with named partners such as Procore, QuickBooks, Autodesk and Acumatica. |
| Rating on G2 | 4.5 out of 5 from 2 reviews | 4.0 out of 5 from 3 reviews |
| Support | Community support is available through GitHub, documentation and the community forum; paid licences also describe email or priority support. | Customers receive help-center content, webinars, in-app chat, phone and email account-manager support. |
| System requirements | Supported desktop systems are 64-bit Windows 10/11, macOS 10.15+ on Apple Silicon and 64-bit Linux; pip installation requires Python 3.12+. | The iOS app requires iOS 15 or later, Android requires Android 9 or later, and the Windows app supports Windows 8, 10 and 11 with .NET Framework 4.8 or newer. |
| What it does | OpenConstructionERP combines construction estimating, BIM and CAD takeoff, BOQs, tendering, scheduling, contracts, site work, quality, safety, finance and reporting in one self-hosted ERP. | STACK is cloud construction software covering plan evaluation, digital takeoff, estimating, bid management, field collaboration and project closeout. |
Plans
OpenConstructionERP
- Self-hostedFree
- CWICR cost database€750, paid once
- Priority SLA€1,200 a year
- cad2data converters€1,800 a year
- DDC cad2data converters€1,800 a year
- Commercial licence€2,500, paid once
- Implementation€3,000, paid once
- White-label€5,000, paid once
- White-label SaaS€5,000, paid once
- Hosted & licensedPriced on request
STACK
- FreeFree
- PremiumPriced on request
- ProPriced on request
- Build & Operate$49 a month
- Takeoff & Estimate$299 a month
- Full STACK Platform$348 a month
- Build & Operate$599 a year
- Takeoff & Estimate$2,599 a year
In their own words
OpenConstructionERP
OpenConstructionERP has no write-up on Specifiction yet; its figures are above.
STACK
STACK is project software for working with plan pages, measurements and cost estimation. Its Free plan supports one active project per month, up to 300 plan pages, 50 measurements per project and one viewer seat. Premium and Pro list unlimited projects, plan pages, measurements and viewer seats, though neither plan has a listed price. STACK is freemium, with a free plan at free and a 7-day trial. It is available on Android, iOS, web and Windows. The company was founded in 2011 and is headquartered in Cincinnati, Ohio, USA. The listed plan details make the free tier’s project, page, measurement and seat allowances explicit; the two paid tiers specify the same unlimited allowances for those categories. Cost estimation is also listed as a capability.